Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  • Level: GCSE
  • Subject: Science
  • Document length: 1207 words

To measure heat loss in two test tubes which represent bodies, one which sweats (the wet test tube) and one body which doesn't sweat (the dry test tube).

Extracts from this document...

Introduction

Biology Coursework: Sweaty Bodies Aim: To measure heat loss in two test tubes which represent bodies, one which sweats (the wet test tube) and one body which doesn't sweat (the dry test tube). Apparatus: 2 Thermometers 2 Stoppers 2 Boiling Tubes 2 Measuring Cylinders Cotton Wool Paper Towels Timer Water Previous Knowledge: I know that when the body gets to hot, the sweat glands produce sweat, which evaporates of the skins surface, and cools the body as it evaporates. The evaporation of water needs a lot of heat energy. This heat energy is taken from the body when the sweat evaporates. Prediction: I think that the wet test tube will cool the fastest because this is what happened during my preliminary experiment. The wet test tube cooled the water down by 22OC more than the dry test tube. Also my knowledge of the way the human body works helps support my prediction because the body produces sweat to cool the body down, and the wet test tube acts in the same way. Diagram: Fair Testing: For all the experiments I'm going to conduct I will have to make sure I do them fairly. ...read more.

Middle

2. I did this by pouring 25cm3 of boiling water in to a boiling tube covered in a wet paper towel and the taking the readings for 10 minutes because the most significant change in temperature occurs between 0 and 10 minutes in my preliminary experiment. 3. I then poured some more boiling water into a boiling tube covered by a dry paper towel. I waited for the temperature to drop so the starting temperature was the same as the starting temperature for the wet test tube. 4. I then took readings of this boiling tube for 10 minutes. Results: Time Temp. in dry Test tube (OC) Temp. in wet test tube (OC) 0 67 67 1 66 61 2 65 56 3 63 53 4 61 49 5 60 46 6 59 44 7 58 42 8 57 40 9 56 39 10 55 37 Calculations: The dry boiling tube cooled by 12OC, and the wet boiling tube cooled by 30OC. The wet boiling tube cooled 18OC more than the dry boiling tube. Plan: Experiment 3. 1. I decided use a stopper at the top of the boiling tube to plug it up. ...read more.

Conclusion

3. I then wet one of the boiling tubes, and took my second reading a minutes later. Results: Time Temp. in dry Test tube (OC) Temp. in wet test tube (OC) 0 63 63 1 62 55 2 60 50 3 60 48 4 58 46 5 57 45 6 56 42 7 55 41 8 55 40 9 54 38 10 53 37 Calculations: The dry boiling tube cooled by 10OC, and the wet boiling tube cooled by 26OC. The wet boiling tube cooled 16OC more than the dry boiling tube. Plan Experiment 6. 1. I did this experiment in exactly the same way I did experiment 5 because I thought that this was the most accurate method, so I wanted to make sure my results were accurate. Results: Time Temp. in dry Test tube (OC) Temp. in wet test tube (OC) 0 64 64 1 62 57 2 61 54 3 60 51 4 59 49 5 58 47 6 57 45 7 56 43 8 55 41 9 54 40 10 53 39 Calculations: The dry boiling tube cooled by 11OC, and the wet boiling tube cooled by 25OC. The wet boiling tube cooled 14OC more than the dry boiling tube. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Here's what a teacher thought of this essay

3 star(s)

This essay is not really a full write up of a practical but rather a discussion of preliminary tests.

It is a good example of how running prelims helps to design an experiment. It could be enhanced to include a summary of how the prelims resulted in the final design.

***

Marked by teacher Sam Morran 15/05/2013

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Green Plants as Organisms essays

  1. The purpose of this investigation was to determine what effects different pH levels, more ...

    were the pants which showed more growth. Whereas, the plants watered with a lower pH of 3 (acidic) or 5 (acidic) showed less growth. The plants that were watered with the pH 7, (Group 3) had the highest average total growth over the three week period which was 8.1cm.

  2. I am trying to find out if sweating helps the body to cool down.

    I will then wrap it around one of the boiling tubes and attach it with 2 elastic bands. I will do the same for the other boiling tube but not wet the paper towel at all. Then I will attach them both on the clamp stands.

  1. Determine the water potential of potato tuber cell with the varying affect of solute ...

    A way to solve this would be to liquidise the potato which would give a very high accuracy due to the large surface area. Another thing I learnt was that when making the cylinders, all the initial masses were different.

  2. How Temperature Effects the Movement of Pigment Through Cell Membranes

    distilled water the beetroot cylinders are placed into to be heated each time, also the time in which the beetroots are washed to begin with will be the same. The heated distilled water that the beetroot cylinders are put into will only be in the water for one minute otherwise

  1. GCSE Biology - Photosynthesis Coursework

    and the boundaries for the measurements, this experiment was not in itself in my opinion accurate enough to be the basis of my main experiment. This lack of accuracy was mainly due to the fact that by simply counting the bubbles, I was relying on each bubble being exactly the same size, which they clearly were not.

  2. Find out what insulator is the best from cotton wool, bubble wrap and plastic ...

    I will do the following to construct my investigation as the following: First, collect the equipment Wrap insulator around the boiling tube Get hot water into beaker Measure 20cm3 of water pour water into boiling tube Wait until it reaches 650c Measure temperature every minute Repeat experiment twice Empty results

  1. The effect of insulating materials on heat loss from the body

    Method 1. Put some of the wool in the bottom of the beaker. 2. Put 200 cm3 of boiled water into the flask and place that in the beaker. 3. Cover the flask in the wool and place the thermometer through a woollen bung.

  2. Marked by a teacher

    Year 11 Module B4 Revision notes. Plants, photosythesis, biomass and the carbon cycle.

    4 star(s)

    The contents of the cell push against the cell wall â this is called turgor pressure. Turgor pressure helps to support the plant tissues. If there is no water in the soil a plant starts to wilt. The cells start to lose water and they lose their turgor pressure.

  • Over 180,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work

Marked by a teacher

This essay has been marked by one of our great teachers. You can read the full teachers notes when you download the essay.

Peer reviewed

This essay has been reviewed by one of our specialist student essay reviewing squad. Read the full review on the essay page.

Peer reviewed

This essay has been reviewed by one of our specialist student essay reviewing squad. Read the full review under the essay preview on this page.